Jakobi　et　al.　for　the　first　time　proposed　a　novel　and　practical　quantum　private　query　(QPQ)　protocol　based　on　SARG04　(Scarani　et　al.　in　Phys　Rev　Lett　92:057901,　2004)　quantum　key　distribution　protocol　(Jakobi　et　al.　in　Phys　Rev　A　83:022301,　2011).　Gao　et　al.　generalized　Jakobi　et　al＇s　protocol　and　proposed　a　flexible　QPQ　protocol　(Gao　et　al.　in　Opt　Exp　20(16):17411-17420,　2012).　When　theta　＜　pi/4,　Gao　et　al＇s　protocol　exhibits　better　database　security　than　Jakobi　et　al＇s　protocol,　but　has　a　higher　probability　with　which　Bob　can　correctly　guess　the　address　of　Alice＇s　query.　In　this　paper,　we　propose　a　flexible　B92-based　QPQ　protocol.　Although　SARG04　protocol　is　a　modification　of　B92　protocol　and　can　be　seen　as　a　generalization　of　B92　protocol,　our　protocol　shows　different　advantages　from　Gao　et　al＇s　protocol.　It　can　simultaneously　obtain　better　database　security　and　a　lower　probability　with　which　Bob　can　correctly　guess　the　address　of　Alice＇s　query　when　theta　＜　pi/4.　By　introducing　entanglement,　the　proposed　QPQ　protocol　is　robust　against　channel-loss　attack,　which　also　implies　lower　classical　communication　complexity.　Similar　to　Gao　et　al＇s　protocol,　it　is　flexible,　practical,　and　robust　against　quantum　memory　attack.